Either rename the cookies, as Vinny suggested, or set the $_CONF['cookiedomain'] accordingly, e.g.<br /><br />$_CONF['cookiedomain'] = 'www.example.com';<br /><br />for the main site and<br /><br />$_CONF['cookiedomain'] = '.subdomain.example.com';<br /><br />for the site on the subdomain (subdomain.example.com).<br /><br />bye, Dirk